change phone number display

app/Helpers/PhoneHelper.php

@@ -0,0 +1,14 @@
+<?php
+namespace App\Helpers;
+
+class PhoneHelper
+{
+    public static function format($phone)
+    {
+        $phone = preg_replace('/[^0-9]/', '', $phone);
+        if (strlen($phone) == 10) {
+            return preg_replace('/([0-9]{3})([0-9]{3})([0-9]{4})/', '$1-$2-$3', $phone);
+        }
+        return $phone;
+    }
+}